Title

Periodic Structures On Curved Surfaces

Date

1963

Index Abstract

Not Available

Photo Quality

Not Needed

Report Number

AFCRL 63-566

Creator

Lean, Eric

Gung-Hwa Ishimaru, Akira

Corporate Author

Washington Univ Seattle Coll Of Engineering

Laboratory

Air Force Cambridge Research Laboratories

Extent

27

Identifier

AD0429755

Access Rights

None

Distribution Classification

1

Contract

AF 19(628)-2763

DoD Project

5635

DoD Task

563502

DTIC Record Exists

No

Distribution Change Authority Correspondence

None

Distribution Conflict

No

Abstract

An extension is presented of the theory developed for plane periodic structures to cylindrical structures having an azimuthal periodicity. The main object is obtaining k - v diagrams (where v is the complex azimuthal propagation constant). Since the cylindrical structures considered have azimuthal periodicity, the fields can be expanded, in accordance with Floquet's theorem, in space harmonics. Two particular structures are considered: (a) the curved corrugated surface and (b) the curved periodic slotted conductors. For (a) the characteristic equation for v is obtained by equating appropriate energies on the surface of the structure; for (b), the characteristic equation is obtained by using the transverse resonance condition. An approximate solution for v is found for structure (a). In this case, a perturbation technique permits obtaining the real and imaginary part of the azimuthal propagation constant for the slow region and for the n equals minus 1 leaky wave region.

Report Availability

Full text available

Date Issued

1963-10

Provenance

Lockheed Martin Missiles & Fire Control

Type

report

Format

1 online resource